US1621485A - Valve construction for gas engines - Google Patents

Description

' March 15, 1927. v 1,621,485 I r E. B. RODGERS VALVE CONSTRUCTION FOR GA$ ENGINES Original Filed Feb. 9, 1922 g i z INVENTOR. [a 144mm .5. fioac'E/zs: v

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A'I'TGRNEY.

Patented Mar. 15, 1927.

1 UNITED STATES EDWARD B. nonenns, orinnw Yonx, N. i

vALvncoNsrnUc'rIonnoR Gas ENGINES:

Q sealed a abandoned application Serial no; 535,327, filed February 9,1922. This application as December 8, 1925.

i This invention has relation to internal combustion engines and has for an object to provide a novel arrangement of intake and-exhaust valves whereby to accomplish the partial cooling of the exhaust valves by the admission of intake gases which are permitted to impinge upon a point located intermediate a pair of exhaust valves, thus cooling both or" said valves simultaneously. 'Anoiher object of the invention is to provide improvements in internal combustion engines and more particularly such engines of the four cylinders, air cooled type whereina pair of exhaust valves are provided for each cylinder to permit the exhaustion of burnt gases, said exhaustion being withdrawn from the cylinder in a lateral direc-' *tion, and wherein an intake valve is provided and located between the exhaust valves and directly thereabove whereby intake gases will impinge upon a point of the cylinderheadbetween the exhaust valves to tl us partially cool both of said valves simultaneously during such action and thereby increase the general efliciency and durability ofthe engine. 7 r

In addition fto the foregoing this invention comprehends improvements in'the details" of construction 'andarrangement. on parts to be hereinafter described and particularly set forth in the appendedclaims. 1

In the accompanying drawings in which similar and corresponding parts are, desighated by the same characters of reference throughout the several views in whichthey apDear Figure 1 is a view in vertical, longitudinal section taken through the cylinder head I and valve chambers of an internal combustion enginejconstructed in accordance with my invention, and j I Figure 2 is a view thereof in vertical transverse section taken on they lines 22 of Figure 1.

sVith reference'to the drawings, 10 indicates the upper end of a cylinder head and 11 a combined intake and exhaust chamber communicating laterally with the upper end of the cylinder through the medium of the passage12. An enlargement 13 is formed with the cylinder. at one Side; and is provided with apair of exhaust ports 14 which extend upward at an angle and communicate with the chamber 11; A pair of openings 15 are drilled in the enlargement 13,

Serial No. 74,182.

cone in each port '14 to receive a vertical bushing 16, each bushing serving as aguide' ground disk valve 18 which bearupon valve seats formed at the juncture of the chamber 11 and the exhaust ports. It' willbenoted that these valves 18-a're in spaced relation as shown in Figurelandthata point has" been indicated by the'letter B upon the floor of the chamber 11 exactly midway between the centers ofthe said valves. A rectangular opening 19 is formed in the cylinder head or in the top wall of the chamber 11 to receive a casting or cap 20 which is pro-1 vided with the flange 21 to rest upon and secured to the cyllnde'rheadby suitable screws or expansion bolts being removed from the chamber 11. Said cap 20 is provided with an angular intake port 22 which communicates with the chamber 11 and a valve seat 23 is formed at the juncture of said intake portand the chamber 11. A vertical opening'24c is formed in the cap to receive a bushing 25, the latter serving to slidably support a valve stem 26. It will. be noted that the vertical center of said v lve stem is located, wh'en'viewed in Figure lindrical'extension28 is formed upon the cap andis hollow to form a cavity through v which the stem 26 extends. A washer 29 is secured'to the upper end of said valve stem and lies flush with the upper edge of the extension 28. iA coil spring 80 is interposed,

between the floor of said cavity and the washer 29 and embraces the valve stem to normally retain the valve 27 in seated posi-' tion. In a similar manner coil springs 31 are embracedabout the lower ends of the valve stem 17 and bear at one end against the casting 13 and at their opposite ends'against grooved conical washers 32 which receive the lower ends of the valve stems and which are held in posit-ion by reason of the conical members 33 which are threadedly or otherwise secured to the lower ends of the-valve V stems and against which the inner sides of said washershear. It will be observed that the sides of the cylinder, the casting 13 and the cap 20 are plentifully supplied with integral flanges and projections 34 for the purpose of promoting the radiation of heat from the engine and to thus ensure the maintenance of a low temperature of the engine during operation.

Upon each intake stroke of the piston the valve 27 will automatically open against the tension of the spring 30 and permit a charge of cool combustible vapor to enter the chamber 11 with considerable velocity. The stream of vapor will thus be directed downoward upon both of the exhaust valves 18 and upon the point B of the chamber wall thus acting to cool said exhaust valves and chamherwallsfand at the same time preheat the charge before its entrance into the cylinder 1 for subsequent ignition. Owing to the combined area of the exhaust ports a rapid discharge of the exhaust gases is ensured with a minimum of back pressure. Also it will be obvious that inasmuch as the exhaust valves are thus swept and cooled by the incoming vapor. the formation of carbon upon and around the exhaust valves is prevented to a considerable extent. Access to the exhaust valves for .regrinding is readily permitted by the removal of the cap .20. -"It will also be noted that the spring .mechanism for the intake valve is almost entirely enclosed within the extension 28 and .in this manner injury. to the parts is prevented by? the accidental striking of objects against t-he' valve spring or valve stem.

Many other conveniences and advantages are presented by the novel construction of my improved engine and the arrangement or its parts which will be readily apparent to those skilled in the art to which this inven tion appertains.

WV-hile I have illustrated and described my .inventioniwi-th some degree of particularity,

I realize that inpractice various, alterations therein may be made, Itherefore reserve the right and privilege of changing the form of the details of construction'or otherwise altering the construction without departing from the spirit of the invention or the scope of the having a chamber disposed laterally at one jcnd of the cylinder and in communication therewith, the bottom wall of said chamber having. a pairof valve seated openings, said cylinder head having a relatively large opening opposite said valve seated openings, an integral extension of the cylinder having a pair of exhaust ports one for each of said valve seated openings, a. valve for each of said openings, spring head stems for said valves, a cap to be received in the second mentioned opening and having a valve seated opening disposed .between the first mentioned openings and in opposition thereto, said cap having an intake port, a valve for said last mentioned valve seated opening, and. a spring press stem for said valve.

' 2. In an internal combustion engine, a cylinder, a lateral extending chamber carried by and communicating with the bore of the cylinder, a plurality of vertically disposed exhaust valves arranged in the bottom of the chamber and a single intake valve arranged in the chamber above and directly intermediate the exhaust valves, whereby the incoming mixture controlled by the intake valve will impinge, upon theexhaust valves and the adjacent cylinder wall to .0001 said valves and wall,

In testimony whereof I afiix my signature.

EDWARD B. aonenns. as

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